Se agrega vista principaldel detalle del plan

src/components/layout/Header.tsx

@@ -0,0 +1,18 @@
+export function Header() {
+  return (
+    <div className="flex items-center gap-4 bg-white border-b shadow-[0_1px_2px_rgba(0,0,0,0.05)] z-10 relative">
+      <div className="h-12 w-12 rounded-full bg-emerald-600 flex items-center justify-center text-white">
+        🎓
+      </div>
+
+      <div>
+        <h1 className="text-xl font-semibold text-gray-900">
+          Gestión Curricular
+        </h1>
+        <p className="text-sm text-gray-500">
+          Sistema de Planes de Estudio
+        </p>
+      </div>
+    </div>
+  )
+}